Question: What’s the height and width of a Facebook cover photo?Do you know the minimum recommended upload size for your Twitter avatar? What’s the dimensions of a shared image on Instagram? How big is a Pinterest board thumbnail? And what about a LinkedIn logo pic?It doesn’t really matter if you’re brand new to social media or a seen it/done it/bought the tee-shirt socially savvy marketing veteran, working out the heights and widths of all those images you need to make your favourite social media channels look good is a time-consuming and, unfortunately, often painfully laborious process.Thankfully, help is at hand via this infographic from Mainstreethost, which provides an image dimension guide for Facebook, Google+, LinkedIn, YouTube, Twitter, Pinterest and Instagram.